This may be hard for anyone to believeābutāChadās marble and mine may be from the same production run, not the same run of colorsājust the same run.
The machines/ovens kept running until they broke down for whatever reason. Production was never stopped to change size or colors--- back then at leastāand more than likely now as well.
āKeep them runningā is in the mind of any production team.
Color changes and variations are more common than anyone may think. The rollers kept rolling, the furnace gases kept cooking, the workers kept working and the colors were bound to change over timeāuntil something broke. This was a time for a size/color changeover, when it broke or wore outānot during production.
It was not about āpretty marblesā so much as it was about keeping costās low.
The lucky few of us that have nice āHybridā Pelts or other makers may understand this a bit better.
All companies did this and this is why all companies have some very weird and rare marbles. Some of the manufacturers had quality control that picked these crossovers out better than othersāsome just let them go.
These posted are mostly Akro and they sure as heck could have come from the same āRunā. I call them āUniquesā but there is nothing unique about them.
Just my thoughts---
MarbleāOn!!